﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = "hello";
            s=s.Replace("he", "123");
            Console.WriteLine(s);
        }
        static void Print (int a)
        {
            if (a == 0)
            {
                return;
            }
            Console.WriteLine( "hello");
            Print(a - 1);
        }

    }
}
